Studies of Thermal Conductivity of Gd2Zr2O7 and Diamond-Like Carbon Films and the Interfacial Effect

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概要

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• Gadolinium zirconium oxide (Gd2Zr2O7) films and diamond-like carbon (DLC) films were prepared by RF-magnetron sputtering and an ion gun method, respectively. To study the thermal conductivity of these films, we used the $3\omega$ and time-domain thermoreflectance (TDTR) methods. The thermal conductivity showed a film thickness dependence for the $3\omega$ method, and this dependence is described as an interfacial effect by considering heat penetration depth in the measurement. The obtained thermal conductivities of the Gd2Zr2O7 and DLC films, independent of the interfacial effect, are 1.6 and 2.5 W m-1 K-1, respectively. The thermal conductivity of the Gd2Zr2O7 films showed no significant thickness dependence for the TDTR method. The conductivities of Gd2Zr2O7 1.6–1.8 W m-1 K-1 obtained by the TDTR method were close to the thermal conductivity of the Gd2Zr2O7 films, independent of the interfacial thermal effect observed in the $3\omega$ method.

• 2010-02-25

著者

• Jun-Gu Kang

  Department of Physics, Pusan National University, Busan 609-735, Korea

• Kang Jun-Gu

  Department of Physics, Pusan National University, Busan 609-735, Korea

• Hong Kyong-Soo

  Pusan Center, Korea Basic Science Institute, Busan 618-230, Korea

• Yang Ho-Soon

  Department of Physics, Pusan National University, Busan 609-735, Korea

• Ho-Soon Yang

  Department of Physics, Pusan National University, Busan 609-735, Korea

関連論文

• Studies of Thermal Conductivity of Gd2Zr2O7 and Diamond-Like Carbon Films and the Interfacial Effect

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